Do you have the knowledge, class work, and time to study to get a 760+ on Physics? A 750 is the same percentile as 690 on E-Bio for a similar population size, so pretty much a wash.
How many times have you taken the SAT? I’d saying improving to 1500+ would be better, but if you’ve already tested 3 times, the chances of that improvement are smaller. (“Superstore” tells me at least twice, no?).