Thank you for your response GG.
I'm definitely in agreement with not touching down at 750fpm
and am aware of flaring. My question was about whether there is any slight pitching up whilst passing the threshold.
What you said about ground speed was interesting. My ground speed was about 160kts. This gave me a descent rate of 800fpm. I was watching my descent rate whilst following the glide slope indicator and it was between 800 and 850, which was why the altitude call outs were too fast. After lowering my ground speed to 150 kts, the call outs sounded more normal.
My reasoning for flying at 155kts airspeed (160 ground speed) was that I was under the impression a b737-8 at max landing weight would have an approach speed of 155kts (airspeed) vref + 5kts.