Your academic profile is very strong, but remember that academics are not the only thing that schools look at. They look for strong evidence of leadership, multi-dimensionality, strength of character as demonstrated through your professional experience, extracurricular activities, and community involvement. Even though you won't have work experience, you'll have to demonstrate the same skills/characteristics -- it's a tougher challenge!
If you've been highly active in college and have held loads of leadership positions in clubs, etc., and if you've had very strong internships where you've taken on serious leadership responsibility, then you can consider programs like Harvard's 2+2 program or perhaps GSB. Wharton is also open to younger candidates. These are obviously top notch schools -- they only accept incredibly top notch college grads. Your GMAT in competitive for them, but if you fall short on the leadership profile, then these schools won't make sense as targets. You'll have to do some research to find out which other schools would be fits with your full profile.
IIMA is a strong school, though I am not too familiar with its requirements. A 740 GMAT should position you well, but presumably the other things I mentioned will also be taken into account. Sorry not to be of more help here!
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