You can get a qualifying CFA without a pullup as a female, but don't rest with that as your score.
Get the pullups in. Keep improving. Do pushups, shoulder presses and assisted pullups until you can do them on your own. Once you can do them on your own, do them about 5 times per day. In other words if you can only do one, then do one, and try to do a second about 5 times through the day until you can do two.
Once you can do two, do that, and try to do a 3rd about 5 times a day. You'll improve.
Work on core excercises also. Pullups are more than upper body strength, it takes a good core.
Remember, admissions is competitive, the best score you can get the better you are. But you can still get a qualifying CFA without a pullup, but you shouldn't rest comfortable with it.
JB