Hi there,
With 75000 rank in common rank list, you can expect an SC category rank of around 2500.
With this rank, the probable colleges and courses for you are:-
1) NIT Hamirpur, Jamshedpur, Raipur, Silchar, Patna:- CSE
2) IIEST Shibpur:- IT
3) MANIT Bhopal, MNIT Jaipur, SVNIT Surat, NIT Jalandhar:- ECE
4) SVNIT, NIT Kurukshetra, MANIT, NIT Hamirpur, Jamshedpur, Raipur, Silchar, Patna:- Mechanical
Hope it would help.
all the best.