Range extending for a WNDR4000

Good afternoon everyone!

For a long period of time it hasn’t been a problem for me to connect to the WI-FI network in my flat. However, things changed and the router’s signal is not strong enough now. I wonder what “repetears” ( eg. WN3000RP aKa N300) are compatible with my N750 WNDR4000 router and hope for receiving help from someone who has faced the same situation and found a solution eventually.

Thank You in advance!