Drinking it now would be a shame and even perhaps give you a wrong opinion of Bordeaux wine. a 1998 Paulliac would be "en travail" (working ?) now with most of the great aromas completely "fermés" (closed).
If you open now,you will get an above average wine with a lingering "green, not ripe enough, fruit" taste. A feeling you get when eating a banana not ripe enough (just an analogy, it does not taste like banana :p )
A few tips
The fridge is excluded !
A real cellar is best but you can buy an electrical wine "cellar" for less than 1000€ (like a specialized wine fridge :p)
Else, lying flat on a shelf in the living room, out of the sun and away from radiators etc, and wrapped in cloth. The wine will not achieve highest potential but it is ok. Note that if you have canicular heat, this option is not valid.
If you insist to drink it now, pour into a "carafe" (decanter), *2-3 hours* before serving at 20°c. The "Room temperature" legend referred to unheated room temp in pre-industrial France !
Kerry, Paris