Table:
text: Administrative division of the People's Republic of Poland
Poland's voivodeships 1975-98 (49 voivodeships)
Polish voivodeships and separate cities 1975-1998
Abbreviation Voivodeship Capital Area_km²_1998 Population_1980 No_of_cities No_of_communes
bp Biała Podlaska Voivodeship Biała Podlaska 5348 286 400 6 35
bk Białystok Voivodeship (1975-1998) Białystok 10 055 641 100 17 49
bb Bielsko-Biała Voivodeship Bielsko-Biała 3 704 829 900 18 47
by Bydgoszcz Voivodeship Bydgoszcz 10 349 1 036 000 27 55
ch Chełm Voivodeship Chełm 3 865 230 900 4 25
ci Ciechanów Voivodeship Ciechanów 6 362 405 400 9 45
cz Częstochowa Voivodeship Częstochowa 6 182 747 900 17 49
el Elbląg Voivodeship Elbląg 6 103 441 500 15 37
gd Gdańsk Voivodeship Gdańsk 7 394 1 333 800 19 43

Question: How many different voivodeships have 747 900 inhabitants in the administrative unit of the People's Republic of Poland?