Use the latest version of any major browser,
then open developer tools,
then cut copy paste to make smaller pages.
Copy the original file, then make 10 copies of it, if you plan to split into 10pages.
Then for each copy, open it then delete all but the content that should stay on that page number.
There simply isn't any automated tool for this because it's not common practice.
Your pages probably refer to alot of image, video , and sound data?
The html file alone isn't 75MB i bet.
Even if it is so, it should fit into memory no problem.
But I imagine scrolling through the page is a pain.
Good luck.