Yes, I have talked to several male 911 operators, there aren't usually as many of them, but they are around. Sometimes they use it as a way to get employed by a law enforcement agency. Once they have their foot in the door it might be easier to become a police officer.
I have only ever had to call 911 less then a handful of times. Though I believe that at least two of those times was a male emergency operator.
I'd imagine womenly voices probably benefit an operator in such an industry. You're talking to panicky people all day long, and you have to get them to chill out. Can you imagine a big deep booming voice from the phone telling you to "please calm down"? lol