On average I'm counting 13 leaves. 6 opposite pairs and a terminal leaf. My first guesses:
Ash - The bark doesnt look right.
Hickory - I dont see the classic bigger 3 leaves at the end of the cluster. I also don't see any nuts growing.
Sumac Varietal - Its awfully big for a Sumac. It's just as tall as my mature red maples.
What do you think? Sorry I cant get a better leaf picture, there arent any low branches.