You shouldn't do this. The Polish Ministry of Foreign Affairs says:
A D-type national visa permits to enter the territory of the Republic
of Poland and to stay continuously or for several successive times in
this territory for a total duration of more than 90 days during the
period of validity of the visa, but not longer than one year.
A D-type national visa also permits to travel in the territory of
other Schengen Area Member States for up to 90 days during a 180-day
period, during the validity period of the visa.
In short, you can stay in Poland for the duration of the visa. Elsewhere in the Schengen area the 90/180 rule applies.
The absence of border controls may mean it is possible, but member states can and do perform checks at borders and elsewhere on an ad hoc basis. Being caught breaching the terms of your visa will make life difficult, at best.