Disagreement on finding out sex!

Court
I've always said that I want the sex of my first-born to be a surprise.  Now my hubs is saying he wants to find out, reasons being that "it'll be easier to plan".  He is far from a planner.  Then he says life is already full of surprises, doesn't think this should be one of them.  I just disagree with him.
 I'm adamant that I don't want to find out prior to birth but I do feel bad... He asked if he could just find out and keep it a secret.  I said no and so I've been pulling the "I'm the one carrying and then birthing therefore I make the last call" card but  I don't want him to feel like his feelings and wants don't matter... What to do?!