From Blood Fever:
73 out of 148 (the crew complement a few episodes later. They started with 141, but added seven + more because of losses... *shrugs* more births than shown, I guess...) makes a gender ratio of about 50/50. Of course, there may be other genders involved, but it appears to be majority human ship, so I reckon the number is close to even.
Known (and presumed) males on Voyager in 2373 (the "73 of '73"):
* Andrews, Arkinson, Ashmore, Ayala, Walter Baxter, Pablo Baytart, Alan Bernard, David Bernard, Rick Berman, Ken Biller,
* Bob Blackman, Jerry Bono, Boylan, Brannon Braga, Freddy Bristow, Doug Bronowski, Dick Brownfield, Joe Carey, Carlson, Chakotay
* William Chapman, Ed Charnock, Jr., Jay Chattaway, Chell, Joe Chess, John Chichester, Ian Christenberry, Richard Chronister, Art Codron, Tom Conley
* Culhane, Dan Curry, Dick D'Angelo, Kenneth Dalby, Bob De La Garza, Doug Dean, Dell, Michael DeMeritt, Jon Djanrelian, Doyle
* Emmanuel, Fitzpatrick, Jerry Fleck, Frank, Gennaro, Cosmo Genovese, Gerron, Patrick Gibson, Grimes, Hargrove
* Mortimer Harren, Henard, Phil Jacobson, Richard James, Jarvin, Ralph Johnson, Harry Kim, Timothy Lang, Larson, Peter Lauritson
* David Livingston, Dennis Madalone, Jim Magdaleno, Mannus, Martin, MacAlister, Dennis McCarthy, William McKenzie, Scott McKnight, McMinn
* James Mees, Mendez, Mitchell
... plus...
* Molina, Tom Moore, Mulchaey, Murphy 1 (Michael Beebe), Murphy 2 (Shepard Ross), John Nesterowicz, Kashimura Nozawa
* O'Donnell, David Orlando, Tom Paris, Michael Parsons, Parsons, Bill Peets, Michael Piller, Jerry Platt, Charlie Quizzlink, Pierre Rahn
* Abraham Rawski, Tony Reynolds, Keith Rockefeller, Rollins, George Rosa, David Rossi, Marvin Rush, Russell, Alan Sims, Brian Sofin
* David Stipes, Michael Stradling, Strickler, Rick Sternbach, Mark Stimson, Ron Surma, Tabor, Angelo Tassoni, William Telfer, Thompson
* Bill Thoms, Jim Thorpe, Tuvok, Vorik, Brad Yacobian, Yosa
...for a total of about 116 males (these are all survivors of Caretaker, btw). Some of them are probably dead, but 43 of them? And the crew complement doesn't seem to fluctuate wildly throughout the series, usually between 141 and 148, so if there are massive die-offs, where are the extra people coming from? This is years before the Equinox crew was added.
I haven't counted the women, but there are way more than 32 of them. Just in case we were thinking that Vorik was being more selective in his count of partners for Torres (even if he said he wasn't).