I got 750340 all india rank in jee main can i get a seat in any govt. colleges of odisha?
According to the rank you have mentioned in the question you cannot get any of the good government colleges as per previous year's cut-offs so I would recommend you to take a drop and prepare for JEE-Main 2021 because you can get some private colleges on this rank but if you want government colleges then you should take a drop and prepare if you can afford it.
Note that the cut-offs are bound to change every year depending upon various factors.
So you can use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India :-
I hope this information helps you.