Yamaha PSR-910 and Technics SX-FN3 Digital Organ – How to do MIDI connection

I want to connect a Yamaha PSR-910 to the Technics SX-FN3 Organ by MIDI.

Will the Technics FN3 organ control the Yamaha keyboard volume by MIDI?

If not how can I do this, if it's possible, what settings do I use?

Need help to do this midi connection between the Yamaha PSR-910 and Technics SX-FN3 Digital Organ.