Rancher 350 FM CCA value

I just purchased my first trickle charger. It's a 12V Schumacher, rated for 750mAh and 300 CCA.

SC1 - Schumacher Electric

I don't know much about batteries, so I'm hoping to get some input as to if I got the right type, since there are others available.

My battery only has a label stating: 12 volts STD:1.4A x 5-10 hours or Quick 6.0A x 1 hour, so I'm not sure what the CCA rating is.

Any help is greatly appreciated!