A 740 math SAT score may be too low for MIT, in my opinion. However, your SAT results seem preliminary, in that you evidently took the exam as a sophomore. Your actual prospects at MIT, therefore, may be subject to change should you decide to retake the SAT, as might be expected.
The above noted, it’s not clear to me from the information you have posted how you would benefit, in particular, from MIT’s math program, however excellent it may be.
If you would like to continue your research into schools with excellent math programs, this topic may be of interest: For Students Seeking a College Strong in Mathematics.
As an overall opinion, it seems you will have some great college options available to you. Perhaps too many, in fact, to be distracted by MIT at this stage.