Retake SAT II Phys (740) or give Chem? (for "top" schools)

Hey guys,

11 days till the Jan test date, and I’m confused which test to give.
I got a 740 on the Physics test which I feel is pretty low for my own and top uni standards.

Would you recommend I retake the Phys test again and hope for 760+, or take chem? Since I only have around a week to prepare, I expect my chem score to be between 700 and 750.

Will a low 700s score on chem be more valuable than increasing my phys score by 20-40 points?

Will a third SAT subject test score be unnecessary or overlooked by many universities?

Yes, I know many have asked similar questions. Yes, I know the final decision is up to me. But any and all advice would be extremely helpful to my indecisive self.

Some context:
I’m applying to many ivy and top schools for CS/Engineering, have a 2340 on the SAT and 800 on the Math II.The 740 in Phys was after retaking it, since I first got only 700.

Thanks in advance!