hi
first off, if you multiply 5 times groundspeed in knots you have the foot per minute rate of descent to maintain a standard 3 degree glideslope.
we do reduce rate of descent near the runway, we call it the FLARE.
touching down at 750 fpm would be a very hard landing.
500fpm is ok for wet or short runways but is firm
300 fpm is usually pretty nice and the max for an overweight landing.
so, where do you start the flare? that's a secret that takes years of flying to really understand.
or there is some advice on flares based on when the fixed distance markers go under your nose.
but I think you should take half your wingspan and use that as the height above touchdown to reduce your rate of descent.
have a nice day.
OH, what instrument do you play skilled musician?