Actually, one or other of the parents do have to be a catholic...
I have a mixed marriage, and was married in a catholic church.. we had to agree to bring our babies up in that faith.
As has been said before, if neither you or your DH are practising catholics, why do you want your child baptised as one? Who will be her guidance in learning about her faith, it helps a child understand more if the parents/parent/godparent is able to help out.