Good weight for a female athlete at 5'6?

i play bball in college and im 18 i also though did sprints in track in hs so i basically ive got waaaay more muscle in my legs than anywhere else its basically all muscle =.= still! but what would be a good weight with the muscle? right now im 170 and im trying to get down to 135-140 bc i heard thats a good weight thanks!