Hi aniket1.
To score 750, you'll have to score at least 41 on the verbal section.
When you're scoring at the 41+ level on GMAT verbal, you don't see any easy questions. You see only medium, medium-hard and hard questions, and only a few of the questions at the beginning will be truly medium questions. The rest of the questions, other than experimental questions, will be medium-hard or hard.
So, of the 30 counted questions, you can expect to see around 3 to 5 medium questions and around 25 to 27 or medium-hard or hard questions.
Of the medium-hard and hard questions, around 3 will be rather hard, maybe another 6 will be hard but not very hard, and the rest will be in the medium-hard range. So, you'll likely see around 9 or 10 counted verbal questions that could be rated hard. You could also see a few hard uncounted experimental questions.
By the way, to score V41+, you'll likely need to get at least all but 5 counted questions correct, though you could score V41 with a few more missed questions if you miss only hard ones.
The key to scoring V41+ will be to get all or close to all of the medium and medium-hard questions correct along with a few hard ones.